| """Execute exactly this copy of pip, within a different environment. |
| |
| This file is named as it is, to ensure that this module can't be imported via |
| an import statement. |
| """ |
| |
| # /!\ This version compatibility check section must be Python 2 compatible. /!\ |
| |
| import sys |
| |
| # Copied from setup.py |
| PYTHON_REQUIRES = (3, 7) |
| |
| |
| def version_str(version): # type: ignore |
| return ".".join(str(v) for v in version) |
| |
| |
| if sys.version_info[:2] < PYTHON_REQUIRES: |
| raise SystemExit( |
| "This version of pip does not support python {} (requires >={}).".format( |
| version_str(sys.version_info[:2]), version_str(PYTHON_REQUIRES) |
| ) |
| ) |
| |
| # From here on, we can use Python 3 features, but the syntax must remain |
| # Python 2 compatible. |
| |
| import runpy # noqa: E402 |
| from importlib.machinery import PathFinder # noqa: E402 |
| from os.path import dirname # noqa: E402 |
| |
| PIP_SOURCES_ROOT = dirname(dirname(__file__)) |
| |
| |
| class PipImportRedirectingFinder: |
| @classmethod |
| def find_spec(self, fullname, path=None, target=None): # type: ignore |
| if fullname != "pip": |
| return None |
| |
| spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target) |
| assert spec, (PIP_SOURCES_ROOT, fullname) |
| return spec |
| |
| |
| sys.meta_path.insert(0, PipImportRedirectingFinder()) |
| |
| assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module" |
| runpy.run_module("pip", run_name="__main__", alter_sys=True) |
